<html>
	<head>
		<script type="text/javascript" 
		src="../js/jquery-1.4.3.js"></script>
		<script type="text/javascript">
			function f1(){
				$("#d1").css('font-size','60px');
			}
			function f2(){
				$('.s1').css('font-size','60px');
			}
			
			function f3(){
				$('div').css('font-size','60px');
			}
			
			function f4(){
				$('#d1,p').css('font-size','60px');
			}
			
			function f5(){
				$('*').css('font-size','60px');
			}
		</script>
	</head>
	<body style="font-size:30px;">
		<div id="d1">Hello jQuery</div>
		<div class="s1">Hello Java</div>
		<p class="s1">Hello Perl</p>
		<a href="javascript:;" id="a1" 
		onclick="f5();">ClickMe</a>
	</body>
</html>